Board Thread:Pokémon Help/@comment-32812083-20170922235657/@comment-31267872-20170923011425

So first, breed a Memento Diglett and a Reversal Diglett. One of the two should be male, the other Diglett should be female.

As of Generation VI or whatever, females can pass down egg moves so it doesn't matter. Breed the two Digletts together and you'll be getting Memento-Reversal Digletts.